The Science Advisory Board hosts a number of science blogs. The latest addition is Longevity Science from Leonid Gavrilov. You may recall his work (with Natalia Gavrilova) on the Reliability Theory of aging, good science that I think we'll be hearing more of in the years ahead. You can find out more about the work of Leonid Gavrilov and Natalia Gavrilova on aging and longevity at their website.
Numerous studies demonstrate that many manifestations of aging can be postponed or even reversed, and that lifespan can be significantly extended in experimental animals. Moreover, our own studies found remarkable plasticity of human longevity ... and suggest that there may be a significant potential for further extension of human lifespan.